Doki Doki Panic English(FDS Emulated) Game Cartridge for NES/FC Console - AliExpress
Found an NES version of Doki Doki Panic on eBay! Thought it'd be a hack of the original sprites on top of Mario 2 but this appears to be the original game!
Yume Koujou Doki Doki Panic (Japan) [En by Vice v1.0] (~Dream World Doki Doki Panic!) ROM < FDS ROMs | Emuparadise
Romhacking.net - Games - Yume Koujou: Doki Doki Panic